4.26.1 reference declarations

Syntax:

reference name = identifier ;

Purpose:

defines a reference object.

Default:

None

Example:

system("reference"); system("shared"); reference empty; empty; ==> <unassigned reference or shared memory> string str = "Hello World!"; reference ref = str; ref; ==> Hello World! ==> ref = 17; // cannot change type of 'i' ==> ? `string`(str) = `int` is not supported ==> ? expected `string` = `string` ==> ? error occurred in or before ./examples/reference_declarations.sing l\ ine 8: ` ref = 17; // cannot change type of 'i'` list ll= list(4, 5, 6); reference lref = ll[2]; lref; ==> 5 ==> lref = str; // change list element ll; ==> [1]: ==> 4 ==> [2]: ==> Hello World! ==> [3]: ==> 6